Wordpress - Single Sign On with memberease question

I'm currently trying to use memberease to create a membership site that will contain a wordpress blog and other files. Basically, my site will have one folder accessible only to members and the wordpress blog will reside inside. Does anyone here know how to use wp functionality for the registration process to integrate registering with another application; specifically memberease?

If memberease is crap, is there a better way to make a subscription wordpress blog, please let me know what that way is. The one plugin I found doesn't seem to be sold anymore.

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